Chronological, biological and geopolitical.

1. MODELS OF ENGLISH

2. Chronological
model of
English

3. Chronological model of English and Scots.
Shared origin: Inglis

4. Biological model: Tree diagram

5. Geopolitical models

6. Tom McArthur’s Circle of World English

7. Three circles of English usage (Kachru, 1985).

10. SOURCES:
http://www.scielo.org.co/scielo.php?pid=S1692-
25222011000200009&script=sci_arttext
https://justinlau15.wordpress.com/tag/american-english
http://eslcarissa.blogspot.com.ar/2011/03/penny-ur.html
https://ltpowers13.wordpress.com/type/aside/
http://www.dsl.ac.uk/about-scots/history-of-scots/
http://www.tutorpal.com/Our_English/History/lchart.html